The measurements of several observables in decays induced by the quark level transition \(b \rightarrow s \ell ^+ \ell ^-\) (\(\ell =e,\, \mu \) ) show propitious signatures of new physics beyond the Standard Model (SM) interactions [1]}. Some of these observables enmesh agglomeration between different lepton flavor. The mismatch between the electron and muon sector, owing to new physics beyond the SM, can be delineated by the ratio observables \(R\) . The lepton flavor universality violating (LFUV) ratios \(R_{K} \equiv \Gamma (B^+ \rightarrow K^+ \mu ^+ \mu ^-)/\Gamma (B^+ \rightarrow K^+ e^+ e^-)\)  and \(R_{K^*} \equiv \Gamma (B^0 \rightarrow K^{*0} \mu ^+ \mu ^-)/\Gamma (B^0 \rightarrow K^{*0} e^+ e^-)\)  has been measured by the LHCb collaboration. The measurement of \(R_K\)  shows a exiguous of 3.1\(\sigma \)  as compared to the SM value \(\approx 1\)  [2]}, [3]} in the 1.1 \(\mathrm {GeV}^2 \le q^2 \le \)  6.0 \(\mathrm {GeV}^2\)  bin [4]}. This is the most significant evidence of LFUV so far. The measurements of \(R_{K^*}\) , in the 0.045 \( \rm {GeV}^2 \le q^2 \le \)  1.1 \(\rm {GeV}^2\)  and 1.1 \(\rm {GeV}^2 \le q^2 \le \)  6.0 \(\rm {GeV}^2\)  bins also has dissent with the SM at level of \(\sim \)  2.5\(\sigma \)  [5]}. These anomalous measurements require new physics with non-universal couplings to muons and electrons.
